Hey guys this may sound like a dumb question, but when I took my blow by hose or whatever it is off my valve cover, there was oil in it, and there was oil in the breather where the blow by hose connected to the it. Is that normal? My dad said the rings were probably bad and oil was coming through and he said that the oil that was in the breather might be getting sucked into the throttle body. Is that true? I am kinda new to all this, so it may be a dumb question I dunno, but any help is appreciated. Also, I switched to an open element recently, and I cant for the life of me find the right size valve cover breather to fit in the metal blow by hose's hole. All the ones in Autozone are way too big.

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Teal Green 91 Camaro RS
305, Automatic Tranny
Stock for now

The oil on the Breather element, unless excessively oily is normal with higher mile engines such as the SB chevy, the oil in the element is most likely not going into our Throttle body, considering the direction of air flow in the engine is not exiting at that at piont, i had this problem a bit when i first bought my 88 firebird, then i started using Castrol Synthetic blend,And Valveoline Synthetic Oil treatment, this just about got rid of the problem completely, but my car was Really i mean really babied by the original owner, i bought it from, so your result may vary, but with anything you will get results!!!!!

Thanks man, you think it would be okay to switch to synthetic oil at 116k miles? Ive been using Havoline.

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Teal Green 91 Camaro RS
305, Automatic Tranny
Stock for now

I had the same problem, finding a plug-in breather that fits...

Measure the diameter of the hole in the rubber grommet that's in the valve cover hole. I think it's 1", but I don't remember. Call up a performance shop and they'll probably have your size in stock (you could just bring the grommet in and check). Somebody like Summit had them online, but they were a rip-off (15 or 20 bucks). Good luck!

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Joel Geerling
Red 91 Formula, 305 TBI
Edelbrock 14x3 open element
TBI 1/2" spacer
Hypertech street chip
Crank/Alt Pulleys
*
Exhaust is next!

no

NOOO! If you have problems with oil going places it shouldn't, synthetic will make it WAY worse. Synthetic oil is so slick it'll go anywhere it wants to if it has the chance.

WHAT? Don't tell me you've done so much bench racing with some of the fools on the internet, that you've been brain washed into believing that you can't switch to synthetic. Tas, Tas, Tas! I hope you have another reason, because that belief that an engine will not be lubricated by synthetic after using conventional (as if some sort of inferiority-complex suffering conventional oil makers purposely sabotaged your engine) is as reputable as a "supercharger" that fits into your intake snorkle.



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No guts, no glory.

About that breather. I just recently put an open air element, i had the same problem. I bought the "K&N Chrome Covered Breather",it was a little lose, well, lose enough that it would be able to fall off that little peice of hose u slip it into. All i did is put a clamp, just tightened it. Plus, it looks nice! And reusable!

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92 Firebird 305 TBI
K&N Open Air Element
K&N Crank Case Filter
Just a begginer, soon i will advance!

I switched to Mobil 1 tri syn with 86k on the clock. No problems at all.

Granted if you change your oil every 3-4k regular oil works fine. The only reason I did it was because my dad and uncle both had great results with it in their TBI trucks (unc had a 91 blazer with 250k miles on it, dad has a 93 Sierra with 130k trouble free miles). The RS gots 114k trouble free miles. *knock on wood*

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Chuck Kulchar
1991 RS
Open Element w/K&N
3" cat and Force II cat-back

You can switch to synthetic oil but its viscosity is lower than conventional oil thus is prone to leaking easier. If your seals are leaking now it will pour on synthetic.